Weird. I'm starting up a new game now, so I'll try it out.

Neat exploit if true.  What difficulty?

This is kind of hilarious, nice find.

I always like to imagine what the AI would be thinking if it were human. Imagine the other nation's leaders gathered in their respective White Houses, pulling hair out and yelling about how they're broke, and the bordering nation has all their money, and all the horses.  
 
"FUCK! Who authorized the horse-gold deal? And who cancelled it? You gave both our horses and our money away, god damn it!"

I want to start a band called Horses for Gold.

I just noticed a similar bug, but with Iron. I had an abundance of iron while going for a cultural victory, so I kept giving Ramses some gold and an iron or two every turn to keep him from attacking me. The following turn the deal would be cancelled, and I'd get extra iron back. After a couple of turns I had gone from 6 iron to 24. Then he offered a defensive pact, so I didn't have to bribe him anymore. I just have a bunch of extra iron now.

The horses thing totally worked for me, but I didn't get the crazy abundance you guys got.

Yep I found this a few days ago, and if you exploit it is completely game breaking. I tested this out in one game, I was able to trade my thousands of horses for cities, eventually the other civs only had their capitals left as they will never refuse 2k horses for a city. Its stupid and needs to be fixed, how they never found this in focus testing..

I don't really get why people get so worked up over single player exploits. If it's game breaking and ruining the game for you then just don't do it. SELF CONTROL PEOPLE!

" I don't really get why people get so worked up over single player exploits. If it's game breaking and ruining the game for you then just don't do it. SELF CONTROL PEOPLE! "

" I want to start a band called Horses for Gold. "

Horses are the hot new commodity. People will do ANYTHING to have a horse. 
I'd give you my entire nation for a horse. 

" @mosdl: Prince.  Things are now completely broke, I now have 1322 horses and neither of the two remaining nations will offer me any gold for the horses anymore and I continue to get notifications that the my deals for horses are being cancled.   Update I just went from 1322 to 1442 horses in one turn "

" Horses are the hot new commodity. People will do ANYTHING to have a horse. I'd give you my entire nation for a horse.  "

yeah, the ai is hard-coded to always buy strategic resources. The doubling thing is hilarious, though.

I had a weird bug during my campaign, and mine wasn't even weird in a good way.  I was playing on the Huge Earth map and Persia was taking over everything and getting ahead of me on points, so I went to stop them.  After I'd taken about 3 cities and killed a bunch of their army, he offered his whole empire apart from the capital (about 40 cities) in return for peace.  That seemed weird enough but whatevs, I accept it and go through the cities liberating the city-states and puppeting everything else.  
 
When I (eventually) finish that I go to hit the CHOOSE PRODUCTION button and it just refuses to go anywhere.  Sigh.  Eventually I realise that it's trying to get me to 'choose production' for a puppet city, which you can't do.  But not being able to do that also meant I couldn't end the turn either, so the game was effectively broken.  In the end I had no choice but to go back through all of the cities and annex them one by one, just so I could get the CHOOSE PRODUCTION button to do something.  This gave me about -250 unhappiness, -250 income and pretty much fucked my previously healthy empire.  So then I had to go back through them all again and raze them to the ground.